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help for project & Proteus.

 
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Gio
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help for project & Proteus.
PostPosted: Mon Nov 30, 2009 2:59 am     Reply with quote
I am working to a project for the management of an antenna rotor by rs232, using Proteus for the simulation.
I am using a 16f877a and my project have WATCHDOG, rs232 INT:, timer1 INT., ADC ecc. , see part of code:
Code:

#include <16F877a.h>
#device *=16
#device adc=10
#fuses WDT,HS, PUT, NOPROTECT, NOLVP

#define ClockSpeed 10000000
#use delay(clock=ClockSpeed)

..........

//------------------
#INT_TIMER1
//------------------
// This function is called every time the timer overflows.
void Timer1_int(void)
{
   set_timer1(TIMER1_INI_VALUE);

   if (--int_count100ms == 0) // Scaduti 100ms
   {
      int_count100ms = INTS_PER_100ms;

      // if rotor is On but not change position
      if ((Rotor.MotorRight == ON || Rotor.MotorLeft == ON) && (Old_DegPos_AZ == DegPos_AZ))
      {
         ++RotorJamCount;
      }
      else
      {
         RotorJamCount = 0;
      }
      Old_DegPos_AZ = DegPos_AZ;

      if (--Counter100ms == 0)   // scaduto 1 secondo
      {
         Counter100ms = 10;
         ++Counter1s;
      }
      if (_delay100ms > 0)  // count 10ms intervals
         _delay100ms--;

   }
   if (_delay10ms > 0)  // count 10ms intervals
      _delay10ms--;
}



//--------------------------------
// RS232 receive interrupt
#int_rda
void serial_isr()
//--------------------------------
{
int tmp;

   RX_buffer[next_in] = fgetc(PC);
   tmp = next_in;
   next_in = (next_in+1) % BUFFER_SIZE;
   if(next_in == next_out)
     next_in = tmp;           // Buffer full !!
}

......

/--------------------------------
void main()
//--------------------------------
{
int8 restart_reason;

   restart_reason = restart_cause();


   setup_wdt(WDT_2304MS);
   restart_wdt();

   int_count100ms = INTS_PER_100ms;
   Counter1s = 0;
   Counter100ms = 10;

   setup_timer_1 ( T1_INTERNAL | T1_DIV_BY_8 );
   set_timer1(TIMER1_INI_VALUE);

   setup_ccp1(CCP_PWM);
   // The cycle time will be  (1/ clock  )   * 4 * t2div * (period + 1)
   // The cycle time is:      (1/10.000.000) * 4 * 1     * (127 + 1   ) = 51.2 us or 19.5 khz
   // setup_timer_2 (mode, period, postscale)
   setup_timer_2(T2_DIV_BY_1, 127, 1);


   setup_adc_ports(RA0_RA1_RA3_ANALOG);
   setup_adc(ADC_CLOCK_INTERNAL);

   CLEAR_INTERRUPT(INT_RDA);
   enable_interrupts(INT_RDA);
   enable_interrupts(INT_TIMER1);
   enable_interrupts(global);

   port_b_pullups(true);

   #use fast_io(A)
   #use fast_io(B)

   set_pwm1_duty(0);

   Motor_Az_OFF();

   SET_TRIS_A(0b00001011);   // set port:   1 = INPUT   0 = OUTPUT
   SET_TRIS_B(0b11110000);   // set port:   1 = INPUT   0 = OUTPUT
   SET_TRIS_C(0b10000000);    // set port:   1 = INPUT   0 = OUTPUT

   lcd_init();

   Check_restart(restart_reason);

 OFFSet      = 1;
   AZ_RANGE    = 360;
   ADC_AZ_Ini  = 5;
   ADC_AZ_End  = 914;
   AZ_Mul_end = ((float) (ADC_AZ_End - ADC_AZ_Ini)) / (float) AZ_RANGE;

   DegPos_AZ  = ADC_to_DEG (CH_AZ, ADC_AZ_Ini, AZ_Mul_End);
   DegReq_AZ = DegPos_AZ;
   
   lcd_clear;
   lcd_putc("Req Az:");
   lcd_gotoxy(1,2);
   lcd_putc("Cur Az:");

     Display_position(1, DegReq_AZ);


   while (TRUE)
      {

      while (isempty(next_in, next_out))  // Here do stuff while waiting for the serial
         {

         //§ SetAzRotorSpeed();

         // This sets the time the pulse is high each cycle.
         //  if value is LONG INT:  value *     (1/clock) * t2div
         //  if value is INT:       value * 4 * (1/clock) * t2div
         // WARNING:  A value too high or low will prevent the output from changing.
         set_pwm1_duty(AzRotorSpeed);   //§


         restart_wdt();

         req_pos_ant();

         Motor_Azimut();

          Display_position(1, DegReq_AZ);

         lcd_gotoxy(13,1);
         printf(LCD_PUTC, "%1u", RotorJamCount/10);

         Display_position(2, DegPos_AZ);
         }

      // Here a character is ready.
      restart_wdt();

      trt_gs232();
      }
}

Everything was ok up to when I have not added a PWM. From that moment the simulation with Proteus has become slow, also 15 seconds or more to notice the pressure of a key.

I have not understood if it is a tied up problem to the simulation with Proteus, if the activation of the PWM interferes with the other resources of the PIC, or if it is one error of my code.

Thank in advance for any help.

Gio
pdl



Joined: 01 Jun 2005
Posts: 45
Location: UK

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PostPosted: Mon Nov 30, 2009 6:06 am     Reply with quote
Try it in the real world, Make the circuit.

I used Proteus on some code and found that it would hang so i made the circuit and programmed a Pic.

thanks

Pete
Jo



Joined: 12 Oct 2009
Posts: 6

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help for project & Proteus.
PostPosted: Wed Dec 02, 2009 8:19 am     Reply with quote
Hello Gio
Can you indicate the full code of your project, enclosed some info
about the electric scheme ? I'm studying a similar project.
Thanks
Jo
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